mongodb

问题 I have did the mongodb installation process mentioned in the following link https://docs.mongodb.com/manual/installation/ but i can't start the mongodb this is my log kindly tell me the possible way to start mongo db C:\>"C:\Program Files\MongoDB\Server\3.4\bin\mongod.exe" 2017-03-12T12:42:55.378+0530 I CONTROL [initandlisten] MongoDB starting : pid=5 400 port=27017 dbpath=C:\data\db\ 64-bit host=vimals 2017-03-12T12:42:55.379+0530 I CONTROL [initandlisten] targetMinOS: Windows 7/W indows

问题 I have did the mongodb installation process mentioned in the following link https://docs.mongodb.com/manual/installation/ but i can't start the mongodb this is my log kindly tell me the possible way to start mongo db C:\>"C:\Program Files\MongoDB\Server\3.4\bin\mongod.exe" 2017-03-12T12:42:55.378+0530 I CONTROL [initandlisten] MongoDB starting : pid=5 400 port=27017 dbpath=C:\data\db\ 64-bit host=vimals 2017-03-12T12:42:55.379+0530 I CONTROL [initandlisten] targetMinOS: Windows 7/W indows

问题 I am weighing the pros and cons of migrating from a relation SQL database to mongodb for a web application. This for performance issues*. Storing all object dependencies in the object itself permits quick "reads" for displaying data to users. On the other hand, some data are presents in different collections (for example username is in the users collection but also in the comments collection). I am wondering how to deal with updates of this duplicated data in order to also have quick "writes"

问题 This question already has answers here : How to list all MongoDB databases in Node.js? (3 answers) Closed 4 years ago . I have seen answers on C# and Java but not able to find anything on NodeJs. I have tried using cmd shell in Windows to get the required output but no luck. I am aware that the same information can be taken in Mongo shell but the requirement is to get a list within the NodeJs app. cmd = child_process.exec('"C:\\Program Files\\MongoDB\\Server\\3.2\\bin\\mongo.exe" admin ; db

问题 I'm using pymongo to allow my Django site to save data to MongoDB. Apparently the MongoClient() class has connection pooling built in, and it should only be instantiated once when Django starts up. So each connection to my Django site will basically reuse that single MongoClient. I see lots of information on the web that states that this is the way it should be done.However, I cannot find any suggestions on where exactly in Django to put this single instance of MongoClient. Most Django

问题 I'm trying to run my application in Spring Boot using MongoDB with spring-data but I can't because IntelliJ shows me this error during build: Error:java: Couldn't find type java.sql.Date. Are you missing a dependency on your classpath? I'm using mongo java driver version 3.8.2, spring boot 2.1 and project is in Java 11. I have no idea what is wrong here could someone help me please? 回答1: Settings -> Build, Execution, Deployment -> Build Tools -> Maven/Gradle -> Runner -> tic on "Delegate IDE

问题 I'm trying to run my application in Spring Boot using MongoDB with spring-data but I can't because IntelliJ shows me this error during build: Error:java: Couldn't find type java.sql.Date. Are you missing a dependency on your classpath? I'm using mongo java driver version 3.8.2, spring boot 2.1 and project is in Java 11. I have no idea what is wrong here could someone help me please? 回答1: Settings -> Build, Execution, Deployment -> Build Tools -> Maven/Gradle -> Runner -> tic on "Delegate IDE

问题 I'm trying to run my application in Spring Boot using MongoDB with spring-data but I can't because IntelliJ shows me this error during build: Error:java: Couldn't find type java.sql.Date. Are you missing a dependency on your classpath? I'm using mongo java driver version 3.8.2, spring boot 2.1 and project is in Java 11. I have no idea what is wrong here could someone help me please? 回答1: Settings -> Build, Execution, Deployment -> Build Tools -> Maven/Gradle -> Runner -> tic on "Delegate IDE

问题 Is it possible to use a variables in MongoDB's query like this? var FOO="123"; var BOO="323"; user.findOneAndUpdate({_id: userID},{$set:{FOO:BOO}} BOO - the value, is working fine and it's being assign, while FOO - the key is not. 回答1: In MongoDB as such no functionality but you can do this in javascript like this var FOO="123"; var BOO="323"; user.findOneAndUpdate({_id: userID},{$set:{[FOO]:BOO}} 来源： https://stackoverflow.com/questions/48136206/how-to-use-variables-in-mongodb-query

问题 I'm running ubuntu 18.04 on windows 10. I run 'mongod' on cli and mongodb starts normally. I then try to run 'mongo' and I get this error : MongoDB shell version v4.0.2 connecting to: mongodb://127.0.0.1:27017 2018-09-01T20:30:37.462+0800 E QUERY [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused : connect@src/mongo/shell/mongo.js:257:13 @(connect):1:6 exception: connect